Flight Controls - Damage from Ground Gusts
- Published
- Effective
- Deadline
- Replaces
- CF-72-06R4
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform specified inspections of the control column, elevator/rudder pulley brackets, and elevator quadrant before further flight and at defined intervals, especially after exposure to strong winds. Required modifications must be incorporated by stated deadlines, and any detected damage must be repaired or replaced promptly according to the directive's criteria.
Summary
Canadian Airworthiness Directive CF-1972-06R5 addresses flight control damage caused by ground gusts on Viking Air Ltd. de Havilland DHC-6 series aeroplanes, including models DHC-6-100, -200, -300, and DHC-6-400. The directive mandates inspections and corrective actions for control columns, elevator/rudder pulley brackets, and elevator quadrants to prevent potential loss of aircraft control due to structural damage.
What changed
This revision clarifies the applicability of corrective actions and endorses Service Bulletin 6/511 as an acceptable method for some inspections. It also replaces dye penetrant inspection with fluorescent penetrant inspection for elevator quadrant support brackets and updates inspection intervals and repair criteria for affected components.
Why it matters
The directive is critical for maintaining flight safety by preventing failure of flight control components damaged by ground gusts. Operators, maintenance organizations, and compliance teams must ensure timely inspections and repairs to avoid in-flight control loss, thereby reducing risk and ensuring regulatory compliance.
More for Viking Air DHC-6 (Twin Otter)
All 7- EASA AD CF-2021-42Engine Controls — Binding of Fuel Control Unit Push Rod End BearingsDec 7, 2021
- EASA AD CF-2020-45R1Flight Controls — Loose Rudder Pedal Torque Tube Quadrant Riveted ConnectionApr 20, 2021
- EASA AD CF-2020-05Wings — Cracking and Corrosion of Aileron Internal StructureMar 17, 2020
- EASA AD CF-2019-02Time Limits / Maintenance Checks — Airworthiness Limitations - ImplementationJan 10, 2019
- EASA AD CF-2018-28Flight Controls — Worn Elevator Cables - Inspection
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